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Soler & Palau · Siber · SystemAir

Ventilation systems in Marbella & the Costa del Sol

Modern, well-sealed homes need controlled fresh air. Whether it's heat recovery ventilation for a new villa or a compliant CMV system for an apartment renovation, we design and install ventilation that works quietly in the background — so you never have to think about it.

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Modern villa interior Marbella ventilation
Why Ventilation Matters

Sealed homes need fresh air — yours included

Modern construction on the Costa del Sol has become increasingly airtight — excellent for keeping cool in summer and warm in winter, but without controlled ventilation, the same sealed envelope that saves energy traps humidity, CO₂, cooking odours and volatile compounds from furniture and paint.

The result is poorer air quality, condensation on cold surfaces, mould growth in hidden corners, and — over time — structural damage. Controlled mechanical ventilation eliminates these problems by replacing stale air with filtered fresh air, continuously and quietly, at the right rate for the property.

  • Eliminates mould and condensation at source
  • Maintains healthy CO₂ levels for better sleep and concentration
  • Required by Spanish building regulations (CTE DB HS3) for new builds and major renovations
  • Works silently alongside your air conditioning and heating
25+
Years on the Costa del Sol
CTE
DB HS3 compliant designs
3
Specialist brands installed
Free
Design survey & airflow calculation
The Systems

Two approaches to controlled ventilation

The right system depends on your property type, renovation scope, and whether heat recovery is a priority. We'll recommend the correct solution after a free site survey.

Most Efficient

HRV — Heat Recovery Ventilation

A heat recovery unit extracts stale air from wet rooms (bathrooms, kitchen, utility) and supplies filtered fresh air to living spaces and bedrooms. In the process, a heat exchanger transfers warmth from the outgoing air to the incoming stream — so in winter you get fresh air without losing heat, and in summer the process works in reverse to reduce cooling load.

  • Recovers up to 90% of the heat from extracted air
  • Reduces humidity without opening windows
  • Filters pollen, dust and particulates from incoming air
  • Minimal running cost — typically less than a light bulb
  • Single central unit with simple ducting throughout
Best for New build villas, full renovations where ductwork can be planned in, properties with humidity issues, clients who want maximum indoor air quality.

CMV — Controlled Air Renewal

Controlled mechanical ventilation without heat recovery: stale air is extracted from wet rooms via a centralised or distributed extract system, and fresh air enters naturally through trickle vents or purpose-built supply points. Simpler to install than HRV and fully compliant with CTE DB HS3 requirements.

  • Lower installation cost than full HRV
  • Easier to retrofit into existing properties
  • CTE DB HS3 compliant for new builds and major refurbishments
  • Continuous low-speed operation — no maintenance beyond annual filter check
  • Can be upgraded to HRV at a later stage
Best for Apartments, smaller properties, retrofit installations where full ductwork isn't practical, projects on a tighter budget.

Spanish building regulations require it — we make compliance straightforward

CTE DB HS3 (the Spanish Technical Building Code, section on indoor air quality) mandates minimum ventilation rates for all new builds and major renovations. Non-compliance can affect your building licence and create issues when selling. Our designs are calculated to meet the required flow rates for each room type, and we provide the documentation you need for the works to be signed off correctly.

Ventilation installation process Marbella
Our Process

From survey to sign-off

Good ventilation starts with the right design. Airflow rates, duct routing, unit selection and noise levels all need to work together — which is why we always begin with a proper site survey before recommending anything.

  1. 1

    Free site survey

    We assess the property — floor plan, room volumes, existing HVAC, renovation scope — and calculate the ventilation rates required under CTE DB HS3.

  2. 2

    System design

    We select the right system (HRV or CMV), size the unit, design the duct layout and specify grille positions for balanced airflow throughout the property.

  3. 3

    Installation

    Our own engineers carry out the full installation — ducting, unit, controls and electrical connections. We coordinate with your architect or builder when part of a larger project.

  4. 4

    Commissioning & handover

    We balance airflows across all grilles, test the system under operating conditions, and hand over with a full explanation of filter maintenance and controls.

Our Brands

Specialist ventilation equipment

We work with three ventilation brands chosen for reliability, parts availability in Spain, and performance in the Costa del Sol climate.

Soler & Palau

🇪🇸 Spanish · Barcelona

One of Europe's largest ventilation manufacturers, S&P has been making fans and ventilation equipment since 1952. Their residential HRV range (Ideo) and extract units are widely used across Spain and backed by excellent local parts availability.

  • Ideo HRV/ERV units for residential whole-house ventilation
  • Inline and centrifugal extract fans for kitchens and bathrooms
  • Proven track record in the Spanish market
  • Parts and technical support available locally

Siber

🇪🇸 Spanish · Ventilation Specialist

Siber specialises in residential and light commercial ventilation systems, with a strong focus on CTE-compliant CMV and HRV solutions for the Spanish market. Quiet, well-engineered units with a compact footprint — well suited to apartments and villas alike.

  • Residential HRV units with high heat recovery efficiency
  • CMV systems designed for CTE DB HS3 compliance
  • Low noise levels — suitable for bedrooms and living areas
  • Compact units designed for easy concealment

SystemAir

🇸🇪 Swedish · Commercial & Residential

Swedish engineering with a global presence, SystemAir makes air handling units, supply/extract fans and commercial ventilation equipment used in larger residential properties and commercial installations. The brand of choice when higher airflows or more complex ducted systems are required.

  • Commercial-grade air handling units (AHUs)
  • High-performance supply and extract fans
  • Suited to large villas, commercial premises and multi-room systems
  • Strong engineering support and documentation
Is It Right for You?

When ventilation makes the most sense

✓ Good candidates

  • New build villas and apartments (CTE requirement)
  • Renovations where new insulation has been added — the property is now more airtight
  • Properties with existing mould, condensation or humidity problems
  • Indoor pools — essential for controlling humidity and protecting the structure
  • Basements and underground garages — CO₂ and vehicle fume extraction
  • Homes where allergy or asthma sufferers need filtered, controlled fresh air

→ Things to consider

  • HRV ductwork is easiest to route during construction or a full renovation — retrofitting into a finished property requires more planning
  • Annual filter cleaning or replacement is required — a simple task but it needs to be done
  • In very open-plan properties with high natural air change (older construction, single-skin walls), the benefit of a full HRV system is lower
  • System sizing matters — undersized ventilation doesn't solve the problem, oversized creates noise and draughts

Areas we cover

Marbella Estepona Benahavís Sotogrande Fuengirola Mijas San Pedro de Alcántara Nueva Andalucía Puerto Banús La Zagaleta

Not sure which system you need?

We'll visit the property, assess it properly and tell you exactly what's required — at no cost and with no obligation.

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